UN opens 7 vacancies in France for English speakers, in Paris and Lyons

Two of the most known U.N. agencies, the United Nations Environment Program (UNEP), and the World Health Organization (WHO) recently opened a total of 7 vacancies for English speakers.
English and French are the working languages of United Nations, among the six official ones.

And you would expect that, to work in France, fluency in French would be a requirement. And here is where you are completely wrong.

If you read the current available Professional (P) vacancies in France with more attention, you will find out that they require fluency in English, and knowledge of French would be an asset. Check the language requirements below, extracted from job post #41493:

“For the post advertised, fluency in oral and written English is required. Knowledge of another UN official language is an advantage.”

Background

The UNEP is an agency that coordinates its environmental activities, assisting developing countries in implementing environmentally sound policies and practices. It was founded by Maurice Strong, its first director, as a result of the United Nations Conference on the Human Environment in June 1972. UNEP headquarters is located in Nairobi, Kenya, and there are also has six regional offices.
The World Health Organization is a specialized agency of the United Nations that is concerned with international public health. It was established on 7 April 1948, headquartered in Geneva, Switzerland.
Check the current positions in both organizations:

Vacancies

Job title Deadline Job ID Grade Agency City Gross annual salary
Communications Officer (Project Post) 12/11/2015 P-3 41943 UNEP PARIS $107,356.53
SENIOR PROGRAMME MANAGEMENT OFFICER 03/12/2015 P-5 44518 UNEP PARIS $158,653.12
Programme Management Officer 03/12/2015 P-3 45597 UNEP PARIS $107,356.53
INTERN - Programme Management 13/11/2015 I-1 50053 UNEP PARIS 0,00
Scientist 04-Nov-15 P-2 IARC-15-FT539 WHO (WHO) LYONS $86,015.83
Secretary 10-Nov-15 G-4 IARC-15-FT569 WHO (WHO) LYONS EUR 44,823.00
Resource Mobilization consultant 22-Nov-15 P level IARC-15-STC5 WHO (WHO) LYONS Not specified

UNEP office in Paris is located at 15 Rue de Milan, Paris.
WHO office is located at 24 rue Jean Baldassini, Lyon.

Remarks:
*P positions are internationally recruited. The usual hiring workflow is a written assessment exercise, followed by an interview and references check from Central Review Bodies.
*G positions are locally recruited. In the example above, you MUST live in Lyons or neighbouring cities to be considered a candidate.
*I positions are internships. In U.N. system, internships are not paid.